What causes audible noise in the LTC3114 DC/DC converter, and how can it be resolved?

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Accepted Answer

Audible noise may be caused by an unshielded or unvarnished inductor, unstable compensation design, or operation in Burst Mode or low-frequency PWM mode. To resolve the issue, use a shielded or varnished inductor, verify compensation stability with bode plot, and try increasing the load or changing the operating mode.

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LTC3114-1: FAQ